U.S. patent application number 15/534796 was filed with the patent office on 2018-08-09 for automatic detection device and automatic detection method for tape.
This patent application is currently assigned to FUJI MACHINE MFG. CO., LTD.. The applicant listed for this patent is FUJI MACHINE MFG. CO., LTD.. Invention is credited to Xiao Dong CHI.
Application Number | 20180228067 15/534796 |
Document ID | / |
Family ID | 56106950 |
Filed Date | 2018-08-09 |
United States Patent
Application |
20180228067 |
Kind Code |
A1 |
CHI; Xiao Dong |
August 9, 2018 |
AUTOMATIC DETECTION DEVICE AND AUTOMATIC DETECTION METHOD FOR
TAPE
Abstract
A control device that determines tape reference positions having
a fixed positional relationship with first origin positions based
on first positions of tape feeding devices when leading ends of
carrier tapes are detected and the first origin positions of the
tape feeding devices immediately before leading end detection.
Then, after determination of the tape reference positions, an
interval between cavities is calculated based on a detection cycle
of transmitted light amounts detected by light being transmitted
through empty cavities. In addition, when a phenomenon, in which a
detected light amount is equal to or smaller than a threshold,
consecutively occurs after calculation of the interval between the
cavities, it is detected that components are accommodated in the
cavities.
Inventors: |
CHI; Xiao Dong; (Nagoya-shi,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FUJI MACHINE MFG. CO., LTD. |
Chiryu-shi |
|
JP |
|
|
Assignee: |
FUJI MACHINE MFG. CO., LTD.
Chiryu-shi
JP
|
Family ID: |
56106950 |
Appl. No.: |
15/534796 |
Filed: |
December 12, 2014 |
PCT Filed: |
December 12, 2014 |
PCT NO: |
PCT/JP2014/083041 |
371 Date: |
June 9, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65H 20/00 20130101;
G01B 11/14 20130101; H05K 13/02 20130101; H05K 13/08 20130101; H05K
13/0812 20180801; H05K 13/0215 20180801 |
International
Class: |
H05K 13/08 20060101
H05K013/08; H05K 13/02 20060101 H05K013/02; G01B 11/14 20060101
G01B011/14; B65H 20/00 20060101 B65H020/00 |
Claims
1. An automatic detection device for tape comprising: a tape
feeding mechanism that feeds the tape, in which cavities for
component accommodation are provided at a regular interval and
which has multiple empty cavities on a leading end side, at a
predetermined pitch, the tape feeding mechanism having multiple
origin positions at an interval which is equal to or larger than
the predetermined pitch; an origin position detector configured to
detect each of the multiple origin positions of the tape feeding
mechanism; a light amount detector configured to transmit light
through the tape and detect a transmitted light amount; a leading
end detection section configured to detect a leading end of the
tape fed by the tape feeding mechanism based on a detected light
amount from the light amount detector; a reference position
determination section configured to determine a tape reference
position, which is in a fixed positional relationship with a first
origin position, based on a first position of the tape feeding
mechanism when the leading end detection section detects the
leading end of the tape and the first origin position of the tape
feeding mechanism immediately before leading end detection by the
leading end detection section; and an interval calculating section
configured to calculate an interval between the cavities based on a
detection cycle of the empty cavities by the light amount detector
after the reference position determination section determines the
tape reference position.
2. The automatic detection device for tape according to claim 1,
wherein the reference position determination section is configured
to determine the tape reference position based on the first
position of the tape feeding mechanism, the first origin position
of the tape feeding mechanism, a feeding amount of the tape from
the first origin position to the first position, and an interval
with an adjacent origin position.
3. The automatic detection device for tape according to claim 1,
wherein the tape feeding mechanism is capable of feeding multiple
types of tapes having different intervals between the cavities, and
the leading end detection section is configured to detect the
leading end of the tape, out of the multiple types of tapes, when
the tape feeding mechanism feeds the tape at a half of a minimum
interval between the cavities as the predetermined pitch.
4. The automatic detection device for tape according to claim 1,
further comprising: a threshold determination section configured to
determine a predetermined threshold to distinguish the empty
cavities from nonempty cavities based on detected light amounts of
the empty cavities from the light amount detector.
5. The automatic detection device for tape according to claim 4,
wherein the threshold determination section is configured to select
the predetermined threshold from multiple thresholds set in advance
based on the detected light amounts of the empty cavities from the
light amount detector.
6. The automatic detection device for tape according to claim 1,
wherein the tape feeding mechanism is configured to set the
predetermined pitch, at which the tape is fed, to a second pitch,
which is larger than a first pitch before the reference position
determination section determines the tape reference position, after
the tape reference position is positioned at a detection position
of the light amount detector, and the interval calculating section
is configured to calculate the interval between the cavities when
the tape feeding mechanism feeds the tape at the second pitch as
the predetermined pitch.
7. The automatic detection device for tape according to claim 5,
further comprising: a component detection section configured to
detect that a component is accommodated in the cavity when a
phenomenon, in which the detected light amount from the light
amount detector is equal to or smaller than the threshold,
consecutively occurs after the interval calculating section
calculates the interval between the cavities.
8. The automatic detection device for tape according to claim 7,
wherein the tape feeding mechanism is configured to set the
predetermined pitch, at which the tape is fed, to the calculated
interval between the cavities after the interval calculating
section calculates the interval between the cavities, and the
component detection section is configured to detect accommodation
of the component when the tape feeding mechanism feeds the tape at
the interval between the cavities as the predetermined pitch.
9. An automatic detection method for a tape, comprising: a tape
feeding step of feeding a tape, in which cavities for component
accommodation are provided at a regular interval and which has
multiple empty cavities on a leading end side, by a tape feeding
mechanism that has multiple origin positions at an interval of a
predetermined pitch, at a pitch which is equal to or smaller than
the predetermined pitch; a leading end detecting step of detecting
a leading end of the tape fed by the tape feeding mechanism based
on a transmitted light amount detected by light being transmitted
though the tape; a reference position determining step of
determining a tape reference position, which is in a fixed
positional relationship with a first origin position, based on a
first position of the tape feeding mechanism when a leading end of
the tape is detected in the leading end detecting step and the
first origin position of the tape feeding mechanism immediately
before leading end detection in the leading end detecting step; and
an interval calculating step of calculating an interval between the
cavities based on a detection cycle of transmitted light amounts
detected by the light being transmitted through the empty cavities
after the tape reference position is determined in the reference
position determining step.
Description
TECHNICAL FIELD
[0001] The present application relates to an automatic detection
device and automatic detection method for tape that can
automatically detect information of the tape.
BACKGROUND ART
[0002] For example, a tape feeder that can automatically load a
tape in which cavities for accommodating components are provided at
a regular interval is disclosed in PTL 1. This automatic loading is
performed by multiple optical sensors detecting a pitch between
adjacent cavities and presence or absence of a component in a
cavity as information of the tape.
CITATION LIST
Patent Literature
[0003] PTL 1: JP-T-2005-539370
SUMMARY
[0004] The device disclosed in PTL 1 tends to have a complicated
configuration since the tape is required to be detected by the
multiple optical sensors. For this reason, a device that can
automatically detect information of tape with a simpler
configuration has been called for.
[0005] The disclosure i s made in view of the circumstances, and an
object thereof is to provide an automatic detection device and
automatic detection method for tape that can automatically detect
information of the tape with a simpler configuration.
[0006] Tc solve the aforementioned problems, an automatic detection
device for tape of the disclosure includes a tape feeding mechanism
that feeds the tape, in which cavities for component accommodation
are provided at a regular interval and which has multiple empty
cavities on a leading end side, at a predetermined pitch, the tape
feeding mechanism having multiple origin positions at an interval
which is equal to or larger than the predetermined pitch, an origin
position detector configured to detect each of the multiple origin
positions of the tape feeding mechanism, a light amount detector
configured to transmit light through the tape and detect a
transmitted light amount, a leading end detection section
configured to detect a leading end of the tape fed by the tape
feeding mechanism based on a detected light amount from the light
amount detector, a reference position determination section
configured to determine a tape reference position, which is in a
fixed positional relationship with a first origin position, based
on a first position of the tape feeding mechanism when the leading
end detection section detects the leading end of the tape and the
first origin position of the tape feeding mechanism immediately
before leading end detection by the leading end detection section,
and an interval calculating section configured to calculate an
interval between the cavities based on a detection cycle of the
empty cavities by the light amount detector after the reference
position determination section determines the tape reference
position.
[0007] In the automatic detection device for tape, the interval
between the cavities can be simply acquired since the tape
reference position, which is in a fixed positional relationship
with the first origin position of the tape feeding mechanism, is
determined and then the interval between the cavities is calculated
by detecting the light amount. Therefore, the cycle time of, for
example, an automatic splicing device or an automatic tape setting
device, to which the automatic detection device for tape is
applied, is reduced and production efficiency is improved.
[0008] In addition, an automatic detection method for a tape of the
disclosure includes a tape feeding step of feeding a tape, in which
cavities for component accommodation are provided at a regular
interval and which has multiple empty cavities on a leading end
side, by a tape feeding mechanism that has multiple origin
positions at an interval of a predetermined pitch, at a pitch which
is equal to or smaller than the predetermined pitch, a leading end
detecting step of detecting a leading end of the tape fed by the
tape feeding mechanism based on a transmitted light amount detected
by light being transmitted though the tape, a reference position
determining step of determining a tape reference position, which is
in a fixed positional relationship with a first origin position,
based on a first position of the tape feeding mechanism when a
leading end of the tape is detected in the leading end detecting
step and the first origin position of the tape feeding mechanism
immediately before leading end detection in the leading end
detecting step, and an interval calculating step of calculating an
interval between the cavities based on a detection cycle of
transmitted light amounts detected by the light being transmitted
through the empty cavities after the tape reference position is
determined in the reference position determining step. According to
the automatic detection method for the tape, the same effects as
the effects of the aforementioned automatic detection device for
tape are achieved.
BRIEF DESCRIPTION OF DRAWINGS
[0009] FIG. 1 is a perspective view illustrating an entire
automatic splicing device to which an automatic detection device
for tape of the embodiment is applied.
[0010] FIG. 2 is a front view illustrating an internal structure of
the automatic splicing device.
[0011] FIG. 3A is a plan view illustrating a carrier tape to be
spliced.
[0012] FIG. 3B is a view seen from a side of the carrier tape
illustrated in FIG. 3A.
[0013] FIG. 3C is a plan view illustrating a different type of a
carrier tape to be spliced.
[0014] FIG. 4 is a view illustrating a tape feeder, to which a reel
wound with carrier tape is detachably attached.
[0015] FIG. 5 is a diagram illustrating a control device of the
automatic splicing device.
[0016] FIG. 6 is a flowchart for describing automatic detection
operation for a tape in the automatic splicing device.
[0017] FIG. 7 is a view illustrating the arrangement of first and
second sprockets, first and second origin position detection
devices, and first and second light amount detection devices and a
feeding state of the carrier tape.
[0018] FIG. 8 is a view illustrating a detection state of a first
origin position of the first tape feeding device immediately before
leading end detection and illustrating the first sprocket and the
carrier tape in this state.
[0019] FIG. 9 is a view illustrating a leading end detection state
and illustrating the first sprocket and the carrier tape in this
state.
[0020] FIG. 10 is a view illustrating a detection state of an
origin position of the first tape feeding device immediately after
leading end detection and illustrating the first sprocket and the
carrier tape in this state.
[0021] FIG. 11 is a perspective view illustrating an entire
automatic setting apparatus for a tape to which the automatic
detection device for tape of the embodiment is applied.
DESCRIPTION OF EMBODIMENTS
[0022] Apparatus to which automatic detection device for tape is
applied
[0023] An automatic detection device for tape of the present
embodiment is a device that can automatically detect information of
a carrier tape, in which cavities for component accommodation are
provided at a regular interval, that is, presence or absence of the
carrier tape, a pitch (interval) between adjacent cavities, and
presence or absence of a component in a cavity. An automatic
splicing device is an example of an apparatus to which the
automatic detection device for tape is applied. The automatic
splicing device is an apparatus that automatically connects the
tail end portion of a carrier tape wound around a current reel
which is mounted on a tape feeder mounted on a component supply
device of a component mounting machine to the starting end portion
of a carrier tape wound around the next reel to be replaced
with.
Configurations of Carrier Tape and Tape Feeder
[0024] First, the carrier tape and the tape feeder will be
described. As illustrated in FIGS. 3A and 3B, carrier tape Tc is
formed in an elongated shape having a predetermined width, and
multiple cavities Ct are formed at a predetermined pitch Pt in a
longitudinal direction. Each of components e to be mounted on a
circuit board are accommodated in the cavities Ct. Upper portions
of the cavities Ct are open and are covered with a top tape Tt that
is attached to the outer surface of the carrier tape To. On one end
side in a width direction of the carrier tape Tc, feeding holes Hc
are formed at regular pitches Pc in the longitudinal direction. In
the embodiment, a carrier tape having a portion in which multiple
empty cavities Ct that do not accommodate components e are
consecutively provided on a leading end side is used as carrier
tape Tc.
[0025] In carrier tape Tc, pitches Pc and sizes of the feeding
holes Hc are the same although pitches Pt and sizes of cavities Ct
vary according to the sizes of the components e. Cavities Ct and
feeding holes Hc are disposed so as to have a fixed positional
relationship, and cavities Ct are formed at predetermined pitch Pt
(=Pc/2) in carrier tape Tc illustrated in FIGS. 3A and 3B such that
one cavity Ct exists at each of positions that are the same as the
positions of the feeding holes Hc and at midway positions between
adjacent feeding holes Hc. In addition, cavities Ctt are formed at
a predetermined pitch Ptt (=Pc) in a carrier tape Tcc illustrated
in FIG. 3C such that one cavity Ctt exists at each midway position
between adjacent feeding holes Hc.
[0026] As illustrated in FIG. 4, reel 11 around which carrier tape
Tc is wound is detachably attached to tape feeder 10. Tape feeding
mechanism 13 that feeds carrier tape Tc wound around reel 11 by a
fixed amount to supply the components e one by one to component
supply position 12, which is on a leading end portion of tape
feeder 10, is provided in tape feeder 10. Tape feeding mechanism 13
is provided with sprocket 14 that is rotatably supported by a main
body of tape feeder 10 and that engages with feeding holes Hc of
carrier tape Tc, and a motor (not illustrated) that rotates
sprocket 14.
Configuration of Automatic Splicing Device
[0027] Next, the automatic splicing device will be described. As
illustrated in FIG. 1, automatic splicing device 20 is provided
with box-shaped housing 21 and cover 22, which is an upper face of
housing 21 that is openable and closable in an up-down direction
(illustrated arrow direction). Automatic splicing device 20 is
configured so as to be placed on a wheeled table (not illustrated)
and to be movable between feeders mounted on the component supply
device of the component mounting machine. Cover 22 is closed during
splicing and is opened during picking up of carrier tape Tc after
splicing.
[0028] As illustrated in FIG. 2, first and second tape feeding
devices 50 and 51, first and second origin position detection
devices 63a and 63b, first and second light amount detection
devices 52 and 53, first and second cutting devices 54 and 55,
first and second fetching devices 56 and 57, bonding device 58, and
control device 59 (refer to FIG. 1) are disposed in housing 21 of
automatic splicing device 20.
[0029] The automatic detection device for tape of the embodiment is
configured with the first and second tape feeding devices 50 and 51
(tape feeding mechanism), the first and second origin position
detection devices 63a and 63b (origin position detector), the first
and second light amount detection devices 52 and 53 (light amount
detector), control device 59 (leading end detection section 94,
reference position determination section 95, interval calculating
section 96, threshold determination section 97, and component
detection section 98 illustrated in FIG. 5).
[0030] The first and second tape feeding devices 50 and 51 are
disposed both in housing 21 and in cover 22, respectively. The
first and second origin position detection devices 63a and 63b are
disposed below first and second sprockets 61a and 61b, which will
be described later, of the first and second tape feeding devices 50
and 51, respectively, and the first and second light amount
detection devices 52 and 53 are disposed so as to vertically oppose
the first and second origin position detection devices 63a and 63b,
respectively, with first and second detection positions Ld1 and Ld2
on first and second conveyance paths 60a and 60b, which will be
described later, of the first and second tape feeding devices 50
and 51 being interposed.
[0031] In addition, the first and second cutting devices 54 and 55
are disposed at first and second cutting positions Lf1 and Lf2,
respectively, between the first and second tape feeding devices 50
and 51. The first and second fetching devices 56 and 57 are
disposed between the first and second cutting devices 54 and 55,
that is, between the first cutting position Lf1 and a splicing
position LS and between the second cutting position Lf2 and the
splicing position LS, respectively. Bonding device 58 is disposed
between the first and second fetching devices 56 and 57.
[0032] The first and second tape feeding devices 50 and 51 are
provided with the first and second conveyance paths 60a and 60b
provided so as to extend in a horizontal direction toward the
middle from both side faces of housing 21, the first and second
sprockets 61a and 61b disposed below the first and second
conveyance paths 60a and 60b, first and second gear motors 62a and
62b concatenated with the first and second sprockets 61a and 61b,
and first and second tape detection devices 64a and 64b disposed
above the first and second conveyance paths 60a and 60b.
[0033] The first and second cutting devices 54 and 55 are provided
with first and second cutters 68a and 68b provided at the first and
second cutting positions Lf1 and Lf2 and a vertical movement
mechanism (not illustrated) that vertically moves the first and
second cutters 68a and 68b. The first and second cutting devices 54
and 55 are configured so as to be capable of cutting unnecessary
portions in cut portions of carrier tapes Tc.
[0034] The first and second fetching devices 56 and 57 are provided
with first and second fetching members 75a and 75b, which are
provided between the first cutting position Lf1 and the splicing
position LS and between the second cutting position Lf2 and the
splicing position LS, and a driving mechanism (not illustrated)
that drives the first and second fetching members 75a and 75b. Each
of the first and second fetching devices 56 and 57 are configured
so as to be capable of fetching a cut unnecessary portion of
carrier tape Tc.
[0035] Bonding device 58 is provided between the first cutting
device 54 and the second cutting device 55, and the conveyance path
60 that makes a part of the first and second conveyance paths 60a
and 60b is formed. Bonding device 58 is configured so as to be
capable of connecting carrier tapes Tc, of which cut portions are
conveyed along conveyance path 60 and are confronted with bonding
device 58 at splicing position LS in the middle of conveyance path
60.
[0036] In automatic splicing device 20, each of two carrier tapes
Tc to be spliced are fed at a predetermined pitch from the first
and second tape feeding devices 50 and 51 at the right and left of
FIG. 2. In the automatic detection device for tape, information of
each carrier tape Tc, that is, presence or absence of the carrier
tapes Tc, a pitch Pt between adjacent cavities Ct (hereinafter,
referred to as a pitch Pt of a cavity Ct), presence or absence of a
component e in a cavity Ct (referred to as a cavity Ct
accommodating a component and an empty cavity Ct) are detected.
[0037] Then, portions where multiple empty cavities Ct are
consecutively provided on the leading end side are cut by the first
and second cutters 68a and 68b of the first and second cutting
devices 54 and 55, respectively, and portions of the cut empty
cavities Ct are fetched by the first and second fetching members
75a and 75b of the first and second fetching devices 56 and 57,
respectively. Then, a protective tape, to which a splicing tape
(not illustrated) to connect the two carrier tapes Tc is attached,
is fed in a direction orthogonal to feeding directions of the
carrier tapes Tc, and cut end portions of the two carrier tapes Tc
are connected to each other by the bonding device 58 with the
splicing tape.
Configuration of Automatic Detection Device for Tape
[0038] Next, the automatic detection device for tape of the
embodiment in automatic splicing device 20 will be described in
detail. As illustrated in FIG. 2, the first and second conveyance
paths 60a and 60b of the first and second tape feeding devices 50
and 51 have widths slightly larger than the widths of the carrier
tapes Tc, and grooves that extend in straight lines are formed from
first and second tape entrances 84a and 84b provided on the both
side faces of housing 21 to the first and second cutting positions
Lf1 and Lf2 of carrier tapes Tc to be cut by the first and second
cutters 68a and 68b, which will be described later, of the first
and second cutting devices 54 and 55.
[0039] As illustrated in FIG. 7, on the circumferences of the first
and second sprockets 61a and 61b, multiple first and second teeth
67a and 67b are formed at the same pitches as the pitches Pc of the
feeding holes Hc of the carrier tape Tc. In the embodiment, the
first and second teeth 67a and 67b are formed at intervals that are
equal to or larger than feeding pitches of carrier tape Tc. The
first and second sprockets 61a and 61b are disposed below the first
and second conveyance paths 60a and 60b such that out of the
rotating first and second teeth 67a and 67b, first and second teeth
67au and 67bu that have come to an uppermost portion while rotating
can be fitted into the feeding holes Hcd of the carrier tapes Tc
that have come along the first and second conveyance paths 60a and
60b while being inserted.
[0040] As illustrated in FIG. 2, the first and second gear motors
62a and 62b are, for example, stepping motors, and are motors that
feed carrier tapes Tc at a predetermined pitch by the concatenated
first and second sprockets 61a and 61b and that can control the
positions of the cut portions of carrier tapes Tc. The first and
second tape detection devices 64a and 64b are, for example, touch
sensors, and are sensors which detect that the carrier tapes Tc are
inserted from the first and second tape entrances 84a and 84b
provided on the both side faces of housing 21 by coming into
contact with the carrier tapes Tc.
[0041] The first and second origin position detection devices 63a
and 63b are, for example, photosensors, and are sensors that detect
one first tooth 67a and one second tooth 67b, out of the multiple
first and second teeth 67a and 67b of the first and second
sprockets 61a and 62b, by sensor light being blocked by teeth 67a
and 67b. Although details will be described later, the positions of
the multiple first and second teeth 67a and 67b of the first and
second sprockets 61a and 61b are defined as the origin positions of
the first and second tape feeding devices 50 and 51, respectively,
in the embodiment. Therefore, the first and second origin position
detection devices 63a and 63b are sensors that detect each of the
multiple origin positions of the first and second tape feeding
devices 50 and 51.
[0042] As illustrated in FIG. 7, the first and second origin
position detection devices 63a and 63b are disposed such that the
first and second teeth 67au and 67bu that have come to the
uppermost portion while rotating, out of the rotating first and
second teeth 67a and 67b, are fitted into the feeding holes Hcd of
the carrier tapes Tc that have come along the first and second
conveyance paths 60a and 60b while being inserted when first and
second teeth 67ad and 67bd (origin positions) that have come to a
lowermost portion while rotating, out of the rotating first and
second teeth 67a and 67b, are detected.
[0043] As illustrated in FIG. 2, the first and second light amount
detection devices 52 and 53 are, for example, photosensors, and are
sensors that detect transmitted light amounts of cavities Ct of
carrier tapes Tc fed by the first and second sprockets 61a and 62b.
The light amounts detected by the first and second light amount
detection devices 52 and 53 are maximum values Lmax when not
blocked by carrier tapes Tc, that is, in a saturated state. The
light amounts vary according to the type of carrier tape Tc when it
comes to the empty cavities Ct. The light amounts are values
smaller than a predetermined value La when it comes to the empty
cavities Ct of the carrier tape Tc illustrated in FIGS. 3A and 3B
and are values larger than the predetermined value La when it comes
to the empty cavities Ctt of the carrier tape `roc illustrated in
FIG. 3C.
[0044] In addition, although light is blocked by tape portions
between adjacent cavities Ct and cavities Ct accommodating the
components, a threshold of a light amount is set according to the
type of carrier tape Tc and determination is made. In other words,
a value Lb smaller than the predetermined value La is set as a
threshold for carrier tape Tc illustrated in FIGS. 3A and 3B, and
when a detected light amount is smaller than the threshold Lb
(<La), it is determined to be tape portions and cavities Ct
accommodating components. The predetermined value La is set as a
threshold for carrier tape Tcc Illustrated in FIG. 3C, and when a
detected light amount is smaller than the threshold La, it is
determined to be tape portions and cavities Ctt accommodating
components.
[0045] Herein, as illustrated in FIG. 7, the first and second light
amount detection devices 52 and 53 (positions of sensor light axes
S) are disposed at detection positions where cavities Ctb formed at
the same positions as those of the feeding holes Hob of the carrier
tapes Tc are positioned, that is, transmitted light amounts of the
cavities Ctb are detected, when the first and second teeth 67ad and
67bd (origin positions) of the first and second sprockets 61a and
62b are detected by the first and second origin position detection
devices 63a and 63b.
[0046] In the embodiment, since the positions of the feeding holes
Hcb, which are at the same positions of the cavities Ctb detected
by the first and second light amount detection devices 52 and 53,
are defined as tape reference positions of carrier tapes Tc
(positions of the feeding holes Hcb), the origin positions of the
first and second tape feeding devices 50 and 51 (positions of the
first and second teeth 67ad and 67bd) are in a fixed positional
relationship with the tape reference positions of carrier tape Tc
(positions of the feeding holes Hcb).
[0047] As illustrated in FIG. 5, tape detection section 90 of
control device 59 is provided with tape feeding control section 91,
origin position detection section 92, light amount detection
section 93, leading end detection section 94, reference position
determination section 95, interval calculating section 96,
threshold determination section 97, component detection section 98,
and memory section 99.
[0048] Tape feeding control section 91 rotation-drives the first
and second gear motors 62a and 62b of the first and second tape
feeding devices 50 and 51 such that carrier tape Tc is fed by an
amount that is equal to or smaller than the pitch Pc of the cavity
Ct, for example, by a feeding amount of Pc/4, which is one fourth
of the pitch Pc, when detection signals of carrier tape Tc are
input from the first and second tape detection devices 64a and 64b.
Then, the first and second gear motors 62a and 62b are
rotation-driven such that the carrier tapes Tc are fed at a faster
speed than the beginning, for example, by a feeding amount of Pc/2,
which is one half of the pitch Pc, when determination signals of
the tape reference positions are input from reference position
determination section 95. In addition, the first and second gear
motors 62a and 62b are rotation-driven and are stopped being
rotation-driven based on the initial positions of the cavities Ct
accommodating the components and the pitch Pc of the cavity Ct read
from the memory section 99.
[0049] Origin position detection section 92 inputs detection
signals of the origin positions of the first and second tape
feeding devices 50 and 51 input from the first and second origin
position detection devices 63a and 63b into the reference position
determination section 95. When a pitch-feeding signal of carrier
tape Tc is input from tape feeding control section 91, light amount
detection section 93 inputs detection signals of light amounts from
the first and second light amount detection devices 52 and 53 for
each pitch-feeding, and inputs the detection signals into leading
end detection section 94, interval calculating section 96,
threshold determination section 97, and component detection section
98. Leading end detection section 94 detects leading ends of the
carrier tapes Tc fed by the first and second tape feeding devices
50 and 51 based on the detection signals of the light amounts input
from light amount detection section 93 and inputs the detection
signals into reference position determination section 95.
[0050] Although details will be described later, reference position
determination section 95 determines, based on the first positions
of the first and second tape feeding devices 50 and 51 when the
detection signals of the leading ends of the carrier tapes Tc are
input from the leading end detection section 94 and the first
origin positions of the first and second tape feeding devices 50
and 51 immediately before leading end detection by leading end
detection section 94, tape reference positions which are in a fixed
positional relationship with the first origin positions, and inputs
the determination signals into tape feeding control section 91 and
interval calculating section 96.
[0051] Herein, determination operation for a tape reference
position based on the first positions and the first origin
positions will be described with reference to FIGS. 8 to 10. Since
the same determination operation for the tape reference position is
applied with respect to carrier tapes Tc inserted from both sides
of automatic splicing device 20, determination operation for the
tape reference position with respect to carrier tape Tc illustrated
in FIGS. 3A and 3B, which is inserted from the right of FIG. 2,
will be described. In addition, in the embodiment, a tape leading
end Th of carrier tape Tc is set as a tape portion between cavity
Ct of feeding hole Ho indicated by a virtual line (one dot chain
line) and cavity Ct adjacent to the cavity Ct as illustrated in
FIG. 8.
[0052] FIG. 8 illustrates a detection state of a first origin
position immediately before leading end detection of carrier tape
Tc. In this state, the position of the tape leading end Th of
carrier tape Tc when a first tooth 67ad1 on the lowermost portion
of first sprocket 61a is detected by first origin position
detection device 63a, that is, when first tooth 67au 1 on the
uppermost portion of first sprocket 61a is fitted into feeding hole
Hcd1 of carrier tape Tc is separated from the detection position of
first light amount detection device 52 (position of the sensor
light axis S) by one fourth of the pitch (Pc/4) to the upstream
side. Description will be given below with reference sign 67ad1
being assigned to first tooth 67a which is detected next to first
tooth 67ad1 and reference sign 67au 1 being assigned to a first
tooth 67a which is fitted into feeding hole Hcd2 next to first
tooth 67au 1.
[0053] FIG. 9 illustrates a leading end detection state of carrier
tape Tc. In other words, a state where first sprocket 61a rotates
by a distance of Pc/4, from a state of the detection of the first
origin position in FIG. 8 (first tooth 67ad1 is detected), carrier
tape Tc goes forward by a distance of Pc/4, and the tape leading
end Th reaches the detection position of first light amount
detection device 52 (position of the sensor light axis S) is
illustrated. The position of first tooth 67ad1 at this time is set
as the first position.
[0054] The reference position determination section 95 acquires a
feeding amount of the carrier tape Tc from the first origin
position to the first position, that is, a distance of Pc/4, based
on the first origin position, that is, a position at which the
first tooth 67ad1 is detected by the first origin position
detection device 63a, and the first position, that is, a position
at which the first tooth 67ad1 is rotated by a distance of Pc/4
after being detected by the first origin position detection device
63a. Then, a difference between an interval with an adjacent origin
position, that is, a distance of Pc, and the feeding amount of
carrier tape Tc from the first origin position to the first
position, that is, a distance of Pc/4, that is, a distance 3Pc/4
are acquired. Then, when carrier tape Tc is fed by the acquired
distance 3Pc/4 from the state of FIG. 9, the position of feeding
hole Hc, which is at the same position as that of the cavity Ct of
the carrier tape Tc positioned at the detection position of the
first light amount detection device 52 (position of the sensor
light axis S) is determined as a tape reference position, which is
in a fixed relationship with the first origin position.
[0055] FIG. 10 illustrates a state where the carrier tape Tc is
positioned at the tape reference position. This state indicates a
detection state of the origin position immediately after leading
end detection of carrier tape Tc, in which first tooth 67ad2 that
has come to the lowermost portion while rotating next to first
tooth 67ad1 of first sprocket 61a is detected by first origin
position detection device 63a, and first tooth 67au 2 that has come
to the uppermost portion while tating next to first tooth 67au 1 of
first sprocket 61a is fitted into feeding hole Hcd2, which is fed
next to feeding hole Hcl1 of carrier tape Tc. The position of the
tape leading end Th of carrier tape Tc at this time is separated
from the detection position of first light amount detection device
52 (position of the sensor light axis S) by three fourths pitches
(3Pc/4) to the downstream side. Therefore, the tape reference
position is the position of feeding hole Hcd0, which is formed at
the same position as that of cavity Ctb positioned at the detection
position of first light amount detection device 52 (position of the
sensor light axis S).
[0056] After a determination signal of the reference position of
carrier tape Tc is input from reference position determination
section 95, interval calculating section 96 detects the empty
cavities Ct of carrier tape Tc based on detected light amounts
input from light amount detection section 93 and a threshold input
from threshold determination section 97, calculates the pitch Pc of
the cavity Ct based on the detection cycle, and stores the pitch Pc
in the memory section 99.
[0057] Based on the detected light amounts input from light amount
detection section 93, threshold determination section 97 determines
a predetermined threshold for distinguishing the empty cavities Ct
stored in advance in memory section 99 from the tape portions
(portions between adjacent cavities Ct) and cavities Ct
accommodating the components. After a calculation signal of the
pitch Pc of cavity Ct is input from interval calculating section
96, component detection section 98 detects the cavities Ct
accommodating the components of carrier tape Tc based on the
detected light amounts input from light amount detection section 93
and threshold input from the threshold determination section 97,
and stores the initial positions of the cavities Ct accommodating
the components in memory section 99.
[0058] Multiple thresholds of light amounts for distinguishing the
empty cavities Ct from the tape portions (portions between adjacent
cavities Ct) and the cavities Ct accommodating the components are
stored in advance in memory section 99. That is, the threshold Lb
(<Lc) that is used in a case where the light amounts of the
empty cavities Ct detected by the first and second light amount
detection devices 52 and 53 are Lc (in the case of carrier tape Tc)
and the threshold La (<Lcc) that is used in a case where the
light amounts of the empty cavities Ctt are Lcc (in the case of the
carrier tape Tcc) are stored in advance. In addition, memory
section 99 stores the pitch Pc of the cavity Ct input from interval
calculating section 96 and the initial positions of the cavities Ct
accommodating the components input from component detection section
98.
Automatic Detection Operation for Tape
[0059] Next, automatic detection operation for tape in automatic
splicing device 20 will be described with reference to the
flowchart of FIG. 6. Since the same automatic detection operation
is applied with respect to carrier tapes Tc inserted from both
sides of automatic splicing device 20, automatic detection
operation with respect to the carrier tape Tc, which is illustrated
in FIGS. 3A and 3B and is inserted from the right of FIG. 2, will
be described below.
[0060] Control device 59 checks whether carrier tape Tc is inserted
from first tape entrance 84a (Step S1 of FIG. 6), and when carrier
tape Tc is inserted from first tape entrance 84a, first sprocket
61a is started to be rotation-driven and carrier tape Tc is
pitch-fed (step S2 of FIG. 6).
[0061] Specifically, tape feeding control section 91
rotation-drives first gear motor 62a and feeds carrier tape Tc by a
feeding amount that is equal to or smaller than the pitch Pc of the
cavity Ct, for example, by a feeding amount of Pc/4, which is one
fourth of the pitch Pc, when a detection signal of carrier tape Tc
is input from first tape detection device 64a.
[0062] The control device 59 checks whether or not the leading end
of the carrier tape Tc is detected (Step S3 of FIG. 6), and when
the leading end of carrier tape Tc is detected, the first position
of first tape feeding device 50 and the first origin position of
first tape feeding device 50 immediately before leading end
detection are detected (Step S4 of FIG. 6). Then, control device 59
determines the tape reference position of the carrier tape Tc based
on the detected first position and first origin position (step S5
of FIG. 6).
[0063] Specifically, when a pitch-feeding signal of carrier tape To
is input from tape feeding control section 91, light amount
detection section 93 inputs a detection signal of a light amount
from first light amount detection device 52 for each pitch-feeding,
and inputs the detection signal into leading end detection section
94. Leading end detection section 94 inputs the detection signal of
the leading end of carrier tape Tc into reference position
determination section 95 when the detected light amount from light
amount detection section 93 is a minimum value Lmin.
[0064] Based on the first position of first tape feeding device 50
when the leading end detection signal is input, the first origin
position of first tape feeding device 50 immediately before leading
end detection, the feeding amount of carrier tape Tc from the first
origin position to the first position, and the interval with the
adjacent origin position, reference position determination section
95 determines a tape reference position, and inputs a determination
signal into tape feeding control section 91 and interval
calculating section 96.
[0065] Control device 59 rotation-drives th first sprocket 61a
faster than the beginning to pitch-feed the carrier tape Tc (step
S6 of FIG. 6), detects a light amount of carrier tape Tc for each
pitch-feeding (step S7 of FIG. 6), and when a light amount of the
empty cavity Ct is detected (step S8 of FIG. 6), a threshold of a
light amount is determined based on the detected light amount (step
S9 of FIG. 6).
[0066] Specifically, tape feeding control section 91
rotation-drives first gear motor 62a faster to feed carrier tape
Tc, for example, by a feeding amount of Pc/2, which is one half of
the pitch Pc of the cavity Ct, when a determination signal of the
tape reference position is input from reference position
determination section 95. Threshold determination section 97 inputs
the detected light amount of carrier tape Tc for each pitch-feeding
from light amount detection section 93, and reads the threshold Lb
of the light amount corresponding to the light amount Lc from
memory section 99 when the light amount Lc of the empty cavity Ct
is input.
[0067] Control device 59 acquires a detection cycle of the light
amount of the empty cavity Ct (step S10 of FIG. 6), acquires the
pitch Pc of the cavity Ct based on the detection cycle, and stores
the pitch Pc in memory section 99 (step S11 of FIG. 6).
[0068] Specifically, interval calculating section 96 inputs the
detected light amount of carrier tape Tc for each pitch-feeding
from light amount detection section 93, and acquires the detection
cycle of the light amount Lc of the empty cavity Ct when the
reference position is input from reference position determination
section 95. Then, the interval calculating section 96 acquires the
detection cycle of the light amount Lc of the empty cavity Ct and
the pitch Pc of the cavity Ct from the feeding pitch of the carrier
tape Tc and stores them in memory section 99.
[0069] Control device 59 rotation-drives first sprocket 61a even
faster to pitch-feed carrier tape Tc (Step S12 of FIG. 6) when the
pitch Pc of the cavity Ct is acquired. When a light amount smaller
than the selected threshold Lb of the light amount is detected,
control device 59 determines whether the detected light amount is
consecutively detected (step S13 of FIG. 6). In a case where the
detected light amount is consecutively detected, control device 59
determines that the initially detected cavities Ct are cavities Ct
accommodating components, and acquires the initial positions of the
cavities Ct accommodating the components and stores them in memory
section 99 (step S14 of FIG. 6).
[0070] Specifically, tape feeding control section 91
rotation-drives first gear motor 62a faster to feed carrier tape
Tc, for example, by a feeding amount of Pc, which is the pitch Pc
of the cavity Ct, when a calculation completion signal of the pitch
Pc of the cavity Ct is input from interval calculating section 96.
Component detection section 98 keeps inputting the detected light
amount of the carrier tape Tc for each pitch-feeding from light
amount detection section 93, determines the initially detected
cavities Ct as the cavities Ct accommodating components when a
light amount smaller than the selected threshold Lb of the light
amount is consecutively detected, acquires the initial positions of
the cavities Ct accommodating components from the pitch Pc of the
cavity Ct and stores them in memory section 99. With the processing
described above, the automatic detection operation for the tape is
completed.
[0071] Thereafter, control device 59 positions the cut portion of
carrier tape Tc at the cutting position based on the stored initial
positions of the cavities Ct accommodating the components and pitch
Pc of cavity Ct and performs splicing operation which includes
cutting, taking in, and bonding.
Effects
[0072] The automatic detection device for tape of the disclosure
includes tape feeding devices 50 and 51 that feed carrier tapes Tc,
in which cavities Ct for component accommodation are provided at a
regular interval Pc and which has multiple empty cavities Ct on the
leading end side, at a predetermined pitch, and that have the
multiple origin positions (positions of the multiple first and
second teeth 67a and 67b) at the interval Pc that are equal to or
larger than the predetermined pitch, origin position detection
devices 63a and 63b that detect the multiple origin positions of
tape feeding devices 50 and 51, respectively, light amount
detection devices 52 and 53 that cause light to be transmitted
through carrier tapes Tc and detect the transmitted light amounts,
and leading end detection section 94 that detects the leading ends
Th of carrier tapes Tc fed by tape feeding devices 50 and 51 based
on the detected light amounts from light amount detection devices
52 and 53. The automatic detection device for tape further includes
reference position determination section 95 that determines the
tape reference positions (positions of the feeding holes Hcd0)),
which are in a fixed positional relationship with the first origin
positions, based on the first positions of tape feeding devices 50
and 51 when the leading ends of carrier tapes Tc are detected by
leading end detection section 94 (position at which the first tooth
67ad1 is rotated by a distance of Pc/4 after being detected by
first origin position detection device 63a) and the first origin
positions of tape feeding devices 50 and 51 immediately before
leading end detection by leading end detection section 94 (position
at which the first tooth 67ad1 is detected by the first origin
position detection device 63a), and interval calculating section 96
that calculates the interval between cavities Ct based on the
detection cycle of the empty cavity Ct from light amount detection
devices 52 and 53 after reference position determination section 95
determines the tape reference positions.
[0073] In the automatic detection device for tape, the interval
between cavities Ct can be simply acquired since the reference
positions of carrier tapes Tc, which are in a fixed positional
relationship with the first origin positions of tape feeding
devices 50 and 51, are determined and then the interval between the
cavities Ct is calculated by performing light amount detection.
Therefore, the cycle time in automatic splicing device 20, to which
the automatic detection device for tape is applied, is reduced and
production efficiency is improved.
[0074] In addition, reference position determination section 95 can
easily determine the tape reference positions since the tape
reference positions are determined based on the first positions of
first tape feeding devices 50 and 51, the first origin positions of
tape feeding devices 50 and 51, the feeding amounts of carrier
tapes Tc from the first origin positions to the first positions,
and the interval with the adjacent origin position.
[0075] In addition, tape feeding devices 50 and 51 feed the
multiple types of carrier tapes Tc and Too having different
intervals between cavities Ct, and the leading end detection
section 94 detects the leading ends of the carrier tapes Tc when
the tape feeding devices 50 and 51 feed carrier tapes Tc, out of
the multiple types of carrier tapes Tc and Tcc, at a predetermined
pitch of Pc/2, which is half of the minimum interval between the
cavities Ct. Accordingly, leading end detection section 94 can
reliably detect even the leading end of a different type of carrier
tape Tc since carrier tape Tc is fed little by little.
[0076] In addition, the automatic detection device for tape
includes threshold determination section 97 that determines the
predetermined threshold La to distinguish empty cavities Ct from
nonempty cavities Ct based on the detected light amounts of empty
cavities Ct by light amount detection devices 52 and 53.
Accordingly, since empty cavities Ct can be distinguished from
nonempty cavities Ct based on whether the detected light amounts
exceed the threshold La, the cavities Ct accommodating the
components e can be reliably detected.
[0077] In addition, based on the detected light amounts of empty
cavities Ct from light amount detection devices 52 and 53,
threshold determination section 97 selects the predetermined
threshold La from the multiple thresholds La and Lb set in advance.
Accordingly, it is possible to distinguish empty cavities Ct and
Ctt from nonempty cavities Ct and Ctt with respect to the multiple
types of carrier tapes Tc and Tcc.
[0078] In addition, tape feeding devices 50 and 51 set a
predetermined pitch, at which the carrier tapes Tc are fed, to a
second pitch Pc, which is larger than a first pitch Pc/2 before
reference position determination section 95 determines the tape
reference positions, after the tape reference positions are
positioned at the detection positions of light amount detection
devices 52 and 53, and interval calculating section 96 calculates
the interval between the cavities Ct when tape feeding devices 50
and 51 feed carrier tapes Tc at the second pitch Pc as a
predetermined pitch. Accordingly, the cycle time of tape detection
can be improved.
[0079] In addition, the automatic detection device for tape
includes component detection section 98 that detects that the
components e are accommodated in the cavities Ct when a situation
in which the detected light amounts from light amount detection
devices 52 and 53 are equal to or smaller than the threshold La
consecutively occurs after interval calculating section 96
calculates the interval between the cavities Ct. Accordingly, the
cavities Ct accommodating the components e can be reliably detected
since empty cavities Ct can be determined based on the number of
times the detected light amounts exceed the threshold La.
[0080] In addition, tape feeding devices 50 and 51 set a
predetermined pitch Pc, at which carrier tapes Tc are fed, to the
calculated interval between cavities Ct after interval calculating
section 96 calculates the interval between cavities Ct, and
component detection section 98 detects accommodation of the
components e when tape feeding devices 50 and 51 feed carrier tapes
Tc at the interval between cavities Ct as a predetermined pitch Pc.
Accordingly, the initial positions of cavities Ct in which
components e are accommodated can be simply and reliably
acquired.
[0081] An automatic detection method for tape of the disclosure
includes a tape feeding step of tape feeding devices 50 and 51 that
have the multiple origin positions at an interval of a
predetermined pitch feeding carrier tapes Tc, in which cavities Ct
for component accommodation are provided at the regular interval Pc
and which have multiple empty cavities Ct on the leading end side,
at a pitch that is equal to or smaller than the predetermined
pitch, and a leading end detecting step of detecting the leading
ends of carrier tapes Tc fed by tape feeding devices 50 and 51
based on the transmitted light amounts detected by light being
transmitted through the carrier tapes Tc. The automatic detection
method for the tape further includes a reference position
determining step of determining the tape reference positions, which
are in a fixed positional relationship with the first origin
positions, based on the first positions of tape feeding devices 50
and 51 when the leading ends of the carrier tapes Tc are detected
in the leading end detecting step, and the first origin positions
of tape feeding devices 50 and 51 immediately before leading end
detection in the leading end detecting step, and an interval
calculating step of calculating the interval between cavities Ct
based on the detection cycle of the transmitted light amounts
detected by light being transmitted through empty cavities Ct after
the tape reference positions are determined in the reference
position determining step. According to this, the same effects as
the effects of the aforementioned automatic detection device for
tape are achieved.
Other
[0082] Although the automatic splicing device has been described as
an example of an apparatus to which the automatic detection device
for tape is applied in the aforementioned embodiment, the automatic
detection device for tape can be applied to, for example, an
automatic setting apparatus for tape that automatically sets
carrier tape in a tape feeder. That is, the automatic detection
device for tape is applied when automatically pulling out carrier
tape that is wound around the reel mounted on the tape feeder and
positioning the cavities accommodating the components on the
leading end of the carrier tape at the component supply position of
the tape feeder. Below, an outline of the automatic setting
apparatus for tape is described.
[0083] As illustrated in FIG. 11, an automatic setting apparatus
for tape 30 is provided with feeding device 31 that conveys carrier
tape Tc pulled out from reel 11, guide 32 that guides the conveyed
carrier tape Tc, supporting board 33 that supports feeding device
31 and guide 32, and seat 34 on which supporting board 33 is placed
and fixed. An operator inserts feeding device 31 and guide 32 into
tape feeder 10 held by a feeder holding stand (not illustrated).
Then, the carrier tape Tc is pulled out from reel 11 of tape feeder
10 and the leading end of the carrier tape Tc is brought to tape
entrance 32a a of guides 32a.
[0084] When sensor 39 detects the leading end of the carrier tape
Tc, each of gear motors 38a, 38b, 38c, and 38d and a motor of tape
feeder 10 start to be driven and each of drive rollers 36a, 36b,
36c, and 36d and sprocket 14 of tape feeder 10 start to be rotated.
Then, when the operator puts the leading end of the carrier tape Tc
into tape entrance 32a a of guides 32a , the carrier tape Tc is fed
by each of drive rollers 36a, 36b, 36c, and 36d and is guided by
guides 32a and 32b. At this time, the cavities Ct accommodating the
components on the leading end of the carrier tape Tc are detected
by the automatic detection device for tape, and the cavities Ct
accommodating the components are positioned at component supply
position 12 of tape feeder 10.
INDUSTRIAL APPLICABILITY
[0085] The automatic detection device for tape of the disclosure is
applicable to an apparatus that automatically detects information
of tape and automatically positions the tape at a predetermined
position.
REFERENCE SIGNS LIST
[0086] 20: automatic splicing device, 50: first tape feeding
device, 51: second tape feeding device, 63a: first origin position
detection device, 63b: second origin position detection device, 52:
first light amount detection device, 53: second light amount
detection device, 59: control device, 94: leading end detection
section, 95: reference position determination section, 96: interval
calculating section, 97: threshold determination section, 98:
component detection section
* * * * *